High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
______________________________________________________________________________________   43
Table 32c. ICUT Register Bit Values for Current-Limit Threshold
ICUT_[2:0] (ADDRESS = 2Ah, 2Bh)
SCALE FACTOR
TYPICAL CURRENT-LIMIT THRESHOLD (mA)
000
1x
375
001
1.5x
563
010
1.75x
656
011
2x
750
100
2.25x
844
101
2.5x
938
110
0.3x
Class 1
111
0.53x
Class 2
Table 33a. Classification Status Registers
ADDRESS = 2Ch, 2Dh, 2Eh, 2Fh
SYMBOL
BIT
R/W
DESCRIPTION
7

Reserved
Reserved
6

Reserved
Table 33b. Class Sequence States
CLS_[5:0]
(ADDRESS = 2Ch, 2Dh,
2Eh, 2Fh)
CLASS
SEQUENCE
ICUT_[2:0]
000000
000 (Class 0)
000
000001
001
000
000010
010
HP[2:0]
000011
011
000
000100
100
000
000101
101
HP[2:0]
000110
110
000
000111
111 (Class 1)
110
001000
002
000
001001
020
011
001010
022
000
001011
200
000
001100
202
100
001101
220
000
001110
222 (Class 2)
111
001111
003
000
010000
030
010
010001
033
000
010010
300
000
010011
303
010
010100
330
000
CLS_[5:0]
(ADDRESS = 2Ch, 2Dh,
2Eh, 2Fh)
CLASS
SEQUENCE
ICUT_[2:0]
010101
333 (Class 3)
000
010110
004
000
010111
040
000
011000
044
000
011001
400
000
011010
404
000
011011
440
000
011100
444 (Class 4)
HP[2:0]
011101
005
000
011110
050
000
011111
055
000
100000
500
000
100001
505
000
100010
550
000
100011
555 (Class 5)
HP[2:0]
100100
Reserved
000
100101
Reserved
000
100110
Reserved
000
100111
Reserved
000
101000
Illegal
000
101001
Illegal
000
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